I did not understand! I want to buy XT1058 And I wanted to know Is it possible to unlock the bootloader?
For the Developer Editions Moto X, and some carrier editions (Like T-Mobile, Sprint and others), Motorola freely gives away the BootLoader Unlock codes when requested On Motorola's Web SIte. In the case of the Non-Developer Editions, it voids their warranty to request the code.
I'm not going to go into the reasons why, but Moto does NOT give out the bootloader unlock code for the Retail and Moto Maker X for Verizon, ATT and a few other carriers.
That is why you will see people ask what carrier.
One last note...
IF you get a 2013 X for ATT or Verizon, AND the phone is still on 4.4.2 or lower AND the bootloader is NOT 30.B7, you can use Sunshine to unlock the bootloader.
NOTE: once the phone has 4.4.2, 4.4.3 or 4.4.4 on it, you can NOT Safely downgrade it!!! And there is no way to downgrade the bootloader (even on Dev Edition models).